An automatic device for controlling the extent to which a humidifier or dehumidifier modifies the relative humidity.
Webster's New World
Other Word Forms of Humidistat
Humidistat Sentence Examples
This model can run for up to 48 hours per setting and has a programmable humidistat that gives you the option to select your desired humidity level.
For example, the Bionaire Cool Mist Tower Humidifier features a space saving tower design, a digital humidistat, a reusable filter and a large tank that produces up to 36 hours worth of mist.
The Bionaire BWM7922-UM Warm Mist Humidifier features a digital humidistat with an LCD output, antimicrobial product protection, a large tank that will last up to 36 hours per use and an empty tank indicator light.
Without an adjustable humidistat, you'll have to manually turn the dehumidifier on and off.